Método writelines () do arquivo Python

Descrição

Método de arquivo Python writelines()grava uma sequência de strings no arquivo. A sequência pode ser qualquer objeto iterável produzindo strings, normalmente uma lista de strings. Não há reembolso.

Sintaxe

A seguir está a sintaxe para writelines() método -

fileObject.writelines( sequence )

Parâmetros

sequence - Esta é a sequência das cordas.

Valor de retorno

Este método não retorna nenhum valor.

Exemplo

O exemplo a seguir mostra o uso do método writelines ().

This is 1st line
This is 2nd line
This is 3rd line
This is 4th line
This is 5th line

#!/usr/bin/python'

# Open a file in witre mode
fo = open("foo.txt", "rw+")
print "Name of the file: ", fo.name

# Assuming file has following 5 lines
# This is 1st line
# This is 2nd line
# This is 3rd line
# This is 4th line
# This is 5th line

seq = ["This is 6th line\n", "This is 7th line"]
# Write sequence of lines at the end of the file.
fo.seek(0, 2)
line = fo.writelines( seq )

# Now read complete file from beginning.
fo.seek(0,0)
for index in range(7):
   line = fo.next()
   print "Line No %d - %s" % (index, line)

# Close opend file
fo.close()

Quando executamos o programa acima, ele produz o seguinte resultado -

Name of the file:  foo.txt
Line No 0 - This is 1st line

Line No 1 - This is 2nd line

Line No 2 - This is 3rd line

Line No 3 - This is 4th line

Line No 4 - This is 5th line

Line No 5 - This is 6th line

Line No 6 - This is 7th line

↰ Previous page